openv:使用python导入highgui

Question

使用以下代码:

import cv
cv.NamedWindow("w1", cv.CV_WINDOW_AUTOSIZE)
camera_index = 0
capture = cv.CaptureFromCAM(camera_index)
def repeat():
  global capture #declare as globals since we are assigning to them now
  global camera_index
  frame = cv.QueryFrame(capture)
  cv.ShowImage("w1", frame)
  c = highgui.cvWaitKey(10)
  if(c=="n"): #in "n" key is pressed while the popup window is in focus
    camera_index += 1 #try the next camera index
    capture = cv.CaptureFromCAM(camera_index)
    if not capture: #if the next camera index didn't work, reset to 0.
        camera_index = 0
        capture = cv.CaptureFromCAM(camera_index)
while True:
    repeat()

Traceback(最近一次调用):文件"pycam.py"，第21行重复()文件"pycam.py"，第12行，重复c = highgui.cvWaitKey(10)NameError:全局名称"highgui"没有定义清理相机

Answer 1

在新的API中有相当多的变化。下面的命令可以工作:

import cv
cv.NamedWindow("w1", cv.CV_WINDOW_AUTOSIZE)
camera_index = 0
capture = cv.CaptureFromCAM(camera_index)
def repeat():
  global capture #declare as globals since we are assigning to them now
  global camera_index
  frame = cv.QueryFrame(capture)
  cv.ShowImage("w1", frame)
  c = cv.WaitKey(10)
  if(c=="n"): #in "n" key is pressed while the popup window is in focus
    camera_index += 1 #try the next camera index
    capture = cv.CaptureFromCAM(camera_index)
    if not capture: #if the next camera index didn't work, reset to 0.
        camera_index = 0
        capture = cv.CaptureFromCAM(camera_index)
while True:
    repeat()

是一个更简单、更清晰的语法!

Answer 2

这意味着highgui不存在。试试这样导入:from opencv import * .

如果不工作，试着检查你的opencv安装